Abstract: A system to join two substantially perpendicular members tightly together. The system finds particular application where it is desired to secure a subfloor to an underlying joist to eliminate squeaking and to rectify a "spongy" floor through reinforcement. The system comprises a brace and a pair of screws of different lengths. The brace includes a pair of working surfaces that meet to form a ninety-degree corner. A flange extends from one of the working surfaces for placement between the top side of the joist and the bottom side of the subfloor. The brace has a pair of parallel pilot holes defined therein for receiving the two screws. The pilot holes are disposed at about a thirty-degree angle relative the joist-mating working surface.